http://ourglobalfuture.com/wp-content/uploads/2017/05/Global-Future-The_case_for_immigration.pdf
https://www.nao.org.uk/wp-content/uploads/2016/02/Managing-the-supply-of-NHS-clinical-staff-in-England.pdf
https://www.llri.lt/wp-content/uploads/2018/06/Labour-Migration_3.pdf
https://www.politico.eu/article/eu-pledges-help-lithuania-migration-belarus-alexander-lukashenko/?utm_source=POLITICO.EU&utm_campaign=766e83f532-EMAIL_CAMPAIGN_2021_08_04_05_03&utm_medium=email&utm_term=0_10959edeb5-766e83f532-190380769